Report Builder: can i define a function in the rdf file ?

Hi All,
About the report builder, can i define a function in the rdf file ? and then i want invoke it in the report SQL, just like :
function Get_Ap_Prepay_Balance(p_Invoice_Id IN NUMBER, p_End_Date IN DATE) RETURN NUMBER IS
l_Amount number;
begin
RETURN l_Amount;
end;
thanks.

You can create functions in reports, but slightly different from doing it in PL/SQL
function Get_Ap_Prepay_Balance return number is
l_Amount number;
begin
assuming that you have invoice_id in your select statement and p_End_Date is a report parameter, you can refer to them in your function as :p_End_Date and :invoice_id
for example select prepay_amount_remaining into l_Amount from ap_invoice_distributions where invoice_id = :invoice_id and accounting_date = :p_End_Date
return(l_Amount);
hope this helps

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